The script creates one database user called 'eMailSignature_Superuser' with password 'changemenow'. Before executing the script you might want to change the password. You can also change the database user name, but then you need to make sure to replace in all respective places.

Open SQL Management Studio on the SQL Server you want to use. Click "New Query" in the Query Editor window, copy/paste the statement and execute the script: If you don't have SQL Server Management Studio installed, then open a command prompt window. In the Command Prompt window, type: sqlcmd -i C:sql_create_script.sql and press ENTER